During setup the st->adc_control is 0, which corresponds to a continuous
conversion mode. The reset value for channel 1 is to enable it. The
combined effect of these two is that the ADC will start conversions for
channel 1 without them being read.
This is not neccessarily a problem, but it is an unexpected behavior.
Set the ADC state to idle during setup to avoid this.
Signed-off-by: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>
---
drivers/iio/adc/ad7124.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index 4d63cd5c9d04..47abefd0fe5f 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -899,6 +899,9 @@ static int ad7124_setup(struct ad7124_state *st)
st->adc_control &= ~AD7124_ADC_CTRL_PWR_MSK;
st->adc_control |= AD7124_ADC_CTRL_PWR(power_mode);
+ st->adc_control &= ~AD7124_ADC_CTRL_MODE_MSK;
+ st->adc_control |= AD7124_ADC_CTRL_MODE(AD_SD_MODE_IDLE);
+
mutex_init(&st->cfgs_lock);
INIT_KFIFO(st->live_cfgs_fifo);
for (i = 0; i < st->num_channels; i++) {
--
2.43.0
